Teeeitoey



(No Model.)

G. DE ROY BAILEY.

1NSULATOR. No. 303,483. Patented Aug. 12, 1884.

mum llllllllllll ATTORNEYS.

f NITED STATES ATENT Erica..

INSULATOR.

SPECIFICATION forming partof Letters Patent No. 303,483, dated August12, 1884.

Application filed April 1, 1884. (No model.)

To all whom it may concern.:

Be it known that I, CHAELEs DE ROY BAI- LEY, a citizen of the UnitedStates, and a resident of Missoula, in the county of Missoula andTerritory of Montana, have invented certain new and useful Improvementsin Insulators; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable othersskilled in the art'to which it appertains to make and use the same,reference being had to the accompanying drawings, which form a part ofthis'specitication, and in which- Figure l is a perspective view of myimproved insulator for electric wires, showing it in position upon thecross-piece of a post. Fig. 2 is a longitudinal section, and Fig. 3 is aperspective view of the several parts detached.

Similar letters of reference indicate corresponding parts in all thefigures.

My invention has relation to insulators for electric wires 5 and itconsists in the improved construction and combination of parts of thesame, as hereinafter more fully described and claimed.

In the accompanying drawings, the letter A indicates a screw-threadedshank, which may be inserted into the post or cross-piece or otherobject where it is desired to attach the insulator, and the upper end ofthe said shank forms a socket, B, provided with perforated lugs or earsO upon its sides, and having a recess, D, which is preferably spherical,having two diametrically-opposite notches, E, in its edge and forming astep, F, at its edge. A cap, G, iits with its stepped lower edge uponthe stepped edge of the socket, has preferably a spherical recess, andtwo diametrically opposite notches, H, corresponding to the notches inthe edge of the socket, and is provided upon its top with a perforatedlug or ear, I. Two hemispherical blocks, J, of glass or othernonconducting material are placed in the socket and in the cap, and havediametrical grooves K in their meeting-surfaces, in which grooves thewire may rest, passing out through the notches inthe cap and the socket.A wire, L, is passed through the ears upon the socket and across the capthrough the ear upon the same, whereupon its ends are united, which willserve to secure the cap upon the socket. In this manner it will be seenthat the insulating material is perfectly protected, and at the sametime the wire is perfectly insulated.

Having thus described my invention, I claim and desire to secure byLetters Patent of the United States In an insulator for electric wires,the combination of a socket having a spherical recess, stepped edgeshaving diametrically-opposite notches, perforated ears upon its sides,and a threaded shank, a cap fitting upon the edges of the socket, havinga spherical recess, diai'netrically-opposite notches in its edges, and aperforated ear upon its top, and two hemispherical blocks, ofnon-conducting material, having diainetrical grooves in their meetingsurfaces, as and for the purpose shown and set forth.

In testimony that I claim the foregoing as my own I have hereuntoaffixed my signature inv presence of two witnesses.

CHARLES DE ROY BAILEY.

